速度入口（Velocity-inlet）： 给出进口速度及需要计算的所有标量值。 该边界条件适用于不可压缩流动问题， 对可压缩问题不适用， 否则该进口边界条件会使入...
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模拟结果表明，在本研究所用的几何布置和换能器与时间相关的速度入口边界条件下，反应器中形成了一个稳定的驻波声场；
The simulated results show that a stable acoustic standing wave is formed in bubble column under the geometric arrangements and the transducer boundary condition employed in this study.
此外，在最近的一项研究中，巢穴上游和巢穴入口处的水流速度，上游朝向东南和朝向其他方向的巢穴相似。
Moreover, in a recent study, current speeds upstream of the nest and at the nest entrance were similar for nests upstream facing southeast and those facing in other directions.
不过现在这些新的人行道实质上只是从a到b的简单的运输装置，远比早期多环道、多速度并带有多出入口的系统要简单。
These new walkways, however, were essentially a single conveyor moving from a to B, far simpler than the earlier many-ringed, multispeed systems with multiple points of entry and exit.
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